How to Add a Domain and SSL Certificate

1. Point your domain's A record to your server's IP address at your DNS provider.
2. Install Certbot for free SSL certificates:

   # Ubuntu/Debian
   apt install certbot python3-certbot-nginx -y
   
   # CentOS/AlmaLinux
   dnf install certbot python3-certbot-nginx -y

3. Obtain and install the certificate:

   certbot --nginx -d yourdomain.com -d www.yourdomain.com

4. Follow the prompts to configure automatic HTTPS redirection.
5. Certbot auto-renews certificates. Verify the timer is active:

   systemctl status certbot.timer

For Apache

# Ubuntu/Debian
apt install certbot python3-certbot-apache -y
certbot --apache -d yourdomain.com -d www.yourdomain.com

# CentOS/AlmaLinux
dnf install certbot python3-certbot-apache -y
certbot --apache -d yourdomain.com -d www.yourdomain.com